Aloysius is a rather tall Elf; he is almost a head taller than Alfur, who by his own admission is already tall for an Elf. He has tan skin and white hair. He has black stick-like legs and arms. Aloysius is dressed in blue & red robes with a red sash, and wears a pointy hat. He carries a staff.
Aloysius is the head of the Delegation for the Return of Wayward Elves.
In "Chapter 12: The Replacement", he and his delegation are send to Trolberg to pick up Alfur, who has been replaced by Alvin as the Northern Counties' correspondent in the city because the Elf Prime Minister and his cabinet believe Alfur's reports about his adventures in Trolberg to be false. To prevent Alfur from having to leave, Hilda comes up with a plan to trick the delegation. They ask the Bragga Family for help, and Agnes volunteers to disguise herself as Alfur. Aloysius, who hasn't seen Alfur yet, falls for it. Agnes can't keep up the appearances for long however, since Aloysisu accidentally triggers her temper when he insists on filling out the proper paperwork first. Alfur is forced to reveal himself to prevent the situation from escalating.
When Alfur tries to escape from the Delegation, Aloysius leads the chase to capture him. The chase takes the Elves to the Farmers Market. There, the Elves are mistaken by the locals, who can't see them, for spirits, and are eventually captured by Gerda Gustav when they enter a lighthouse decoration. Alvin and Alfur are the only elves not captured since they jumped out of the lighthouse in time. Along with the other captured Elves, Aloysius is brought to Safety Patrol HQ by Gerda, where she attempts to interrogate them. Alfur rescues the group by tricking Gerda into believing he is a member of the Spirit Safety Patrol, so she releases the captured "spirits" into his custody.
While Aloysius is impressed, he still has to take Alfur with him, until Alvin reveals he filled out an eyewitness confirmation form to clear Alfur's name. The Delegation thus departs without Alfur.